气相色谱法分析氢同位素气体  

Analysis of Hydrogen Isotopes with Gas Chromatography

作　　者：褚效中[1] 周亚平[1] 周理[2] 寇登民[3] 

机构地区：[1]天津大学化学系,天津300072 [2]天津大学化工研究所,天津300072 [3]南开大学化学学院,天津300071

出　　处：《分析化学》2006年第5期629-632,共4页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金资助项目(No.20336020)

摘　　要：针对氢同位素气体H2、HD与D2之间难以定量分析,本研究对常规气相色谱仪做了改进,使用固定相为改性氧化铝的双填充柱在液氮温度(77.4K)下分析H2、HD与D2的定量组成。考察了桥流、检测温度、载气流量、进样量与不同载气因素对H2、HD与D2保留时间、峰形与信号灵敏度的影响。实验结果表明在桥流180mA、检测温度120℃、氦载气流量110cm3/min与进样量0.1mL的检测条件下,该分析系统可以使H2、HD与D2的保留时间分别缩短至66s、79s与94s,并得到较好的峰形与定量结果。Hydrogen isotopes, H2, HD and D2, are difficult to be separated tional gas chromatographs. Amelioration was, therefore, made using twin packing and quantified with convencolumns of modified alumina immersed in liquid nitrogen, and the influence of bridge current, detection temperature, cartier gas flow rate, injection amount and the sort of carrier gas on the retention time, shape of peak and signal sensitivity were investigated presently. It was shown that the modified chromatography and the selected analysis condition, namely, bridge current 180 mA, detection temperature 120℃, He carrier gas flow rate 110 cm^3/min and injection amount 0.1 mL, produced the retention time 66 s, 79 s and 94 s for H2, HD and D2, respectively, and the peaks have a good shape. As a result, reliable quantitative results were obtained.

关 键 词：氢同位素 固定相 改性氧化铝 保留时间 

分 类 号：O657.71[理学—分析化学]